The correct answer is A. silica.
The amount of silica found in the magma determines the viscosity. The higher the silica in magma, the higher the viscosity of a magma. So the correct answer is silica. It is not among the other choices.
Answer:
c. 10-10 seconds
Explanation:
To be able to penetrate very deeply into the matter we need to generate very high energies, we need somehow very energetic particles that can test very small distances inside the matter. And for that you have to build particle accelerators. For example, a proton is a constituent of the atom, the nucleus of the hydrogen atom. These particles accelerate in an accelerator until they reach speeds very close to the speed of light and the highest energies ever before reached by a man-made instrument on earth.
Then with these high energies we test the small distances, the deepest structure of matter and what is interesting is that by producing these enormous energies in a laboratory and in a tiny microscopic region of space we are reproducing the conditions that were present in our universe primitive. Actually in fractions of seconds after the Big Bang.
Technology is enough for us today to reach 10 ^ (- 10) seconds after the Big Bang (ie 0.0000000001 seconds).
A bureau is defined as the department or division of the government, that is helpful for distributing the data and collecting the work.
<h3>
How does the US Census Bureau define an urban area?</h3>
Urban are defined as the areas that including at least 2,500 and less than 50,000 people. On the other hand, "Rural" defined as any population, housing, or territory outside urban areas.
Urban areas are generally defined as the towns and cities. Under these areas people have sufficient amount of money because the job availability.
Learn more about Bureau, refer to the link:
brainly.com/question/11397862
Answer:
Stratovolcanoes
Explanation:
Stratovolcanoes are usually defined as those volcanoes that are characterized by the presence of steep slopes, having a height of about thousands of feet and comprised of alternate layers of ash deposited particles and lava flows. These are very explosive and when it comes in contact with water, it erupts violently. These are also known as composite volcanoes. It produces pyroclastic materials, along with volcanic blocks and ashes with a large amount of toxic gases.
